On the scene at Navy Yard shooting

We are told that a shooter could be on the fourth floor of building 197.

http://archive.federaltimes.com/VideoNetwork/2675746263001/On-the-scene-at-Navy-Yard-shootinghttp://archive.federaltimes.com/VideoNetwork/2675746263001/On-the-scene-at-Navy-Yard-shootinghttp://download.gannett.edgesuite.net/wusa/brightcove/29906171001/201309/2411/29906171001_2674825595001_file-13909804-3dee4e5263593468ac9b019288b731ef.jpgOn the scene at Navy Yard shootingWe are told that a shooter could be on the fourth floor of building 197.41CrimelocalNewsWUSA04:15